Salt-Powered Innovation: Indian Teens Develop Electricity-Free Refrigerator to Aid Rural Healthcare Instagram
In a remarkable display of ingenuity, three teenagers from Indore, India—Dhruv Chaudhary, Mithran Ladhania, and Mridul Jain—have developed an innovative, electricity-free refrigerator named Thermavault. This device utilizes a salt-based cooling mechanism to preserve vaccines and medical supplies in areas lacking reliable electricity.Business Insider
🧪 The Science Behind Thermavault
Thermavault operates on an endothermic reaction principle. When certain salts dissolve in water, they absorb heat from their surroundings, resulting in a cooling effect. The team experimented with approximately 150 salts before identifying ammonium chloride and barium hydroxide octahydrate as optimal for their needs.Lifeboat Foundation
Ammonium chloride maintains temperatures between 2°C to 6°C, suitable for most vaccines.Business Insider
Barium hydroxide octahydrate achieves sub-zero temperatures, ideal for certain vaccines and organ transplants.Business Insider
The refrigerator comprises an insulated plastic container with a copper-lined inner chamber. The salt solution circulates between the outer and inner walls, extracting heat from the contents without requiring electricity.Business Insider
🌍 Real-World Impact and Future Plans
The trio's invention has garnered significant attention, earning them the 2025 Earth Prize and a $12,500 award. They plan to use these funds to produce 200 Thermavault units for testing in 120 hospitals, aiming to assist in the transportation and storage of vaccines and medical supplies in remote regions.Business Insider
Dr. Pritesh Vyas, an orthopedic surgeon at V One Hospital in Indore, tested the device and confirmed its efficacy in maintaining vaccine temperatures for up to 12 hours. He noted that with enhancements like integrated temperature monitoring, Thermavault could be invaluable in rural healthcare settings.Business Insider
Looking ahead, the team seeks World Health Organization (WHO) certification and plans to pursue a patent, with aspirations to collaborate with global health organizations such as Gavi to expand the reach of their innovation.Business Insider
🔁 Sustainability and Reusability
A standout feature of Thermavault is its reusability. After use, the salt solution can be boiled to evaporate the water, allowing the salts to be recovered and reused. This cycle can be repeated without the need for electricity, making it especially suitable for areas with limited infrastructure.Yahoo News
📚 Sources
Business Insider: 3 teens invented a salt-powered refrigerator that doesn't need electricity
Yahoo News: 3 teens invented a salt-powered refrigerator that doesn't need electricity
Startup Pedia: 3 Indian Teens Win $12,500 Earth Prize 2025 For Inventing Salt-Powered Fridge
Pivot: Salt-powered refrigerator: Life-saving invention of Indian teenagers
Lifeboat Foundation: 3 teens invented a salt-powered refrigerator that doesn't need electricity
This groundbreaking innovation exemplifies how youthful creativity and scientific understanding can converge to address critical global health challenges, particularly in underserved regions.
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